Six Eyed Sand Spider

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The six-eyed sand spider (Sicarius hahnii) is a medium-sized spider of deserts and other sandy places in southern Africa.

It is a member of the Sicariidae family; close relatives may be found in both Africa and in South America, and its near cousins, the recluses (Loxosceles) are found worldwide.

Due to its flattened stance and laterigrade legs, it is also known as the six-eyed crab spider.

Assays of its venom have led some to recognize this spider's bite as the most dangerous on record.

There is some question as to the danger posed by this spider. It is very shy and unlikely to bite humans, and there are few (if any) recorded human envenomations by Sicarius. However, toxicology studies have demonstrated that the venom is particularly potent, with a powerful hemolytic/necrotoxic effect, causing blood vessel leakage and tissue destruction.

Envenomations of laboratory animals have yielded devastating results, with many of the test subjects developing multiorgan breakdowns. Unlike the dangerous neurotoxic spiders (the widow spiders, the Australasian funnel-web spider, and the Brazilian wandering spiders), no antivenin currently exists for Sicarius, leading many authorities to suspect that a bite by this spider is likely to produce a fatality.